<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="UTF-8" />
        <title>24_CSS3-新增背景属性-复合写法</title>
        <style>
            div {
                width: 800px;
                height: 400px;

                background: red url(./img/bg-br.png) no-repeat fixed left center / 400px 300px content-box;
            }
        </style>
    </head>
    <body>
        <!-- 
            background-color
            background-image
            background-repeat
            background-attachment
            background-position
            background-size
            background-origin
            background-clip

            position必须在size的前面 加/

            origin如果和clip值一致 可以省略 变成一个
         -->

         <div>

         </div>
    </body>
</html>